num-bigint
Big integer types for Rust, BigInt and BigUint.
Usage
Add this to your Cargo.toml:
[dependencies]
num-bigint = "0.4"Features
The std crate feature is enabled by default, and is mandatory before Rust
1.36 and the stabilized alloc crate. If you depend on num-bigint with
default-features = false, you must manually enable the std feature yourself
if your compiler is not new enough.
Random Generation
num-bigint supports the generation of random big integers when the rand
feature is enabled. To enable it include rand as
rand = "0.8"
num-bigint = { version = "0.4", features = ["rand"] }Note that you must use the version of rand that num-bigint is compatible
with: 0.8.
Releases
Release notes are available in RELEASES.md.
Compatibility
The num-bigint crate is tested for rustc 1.31 and greater.
Alternatives
While num-bigint strives for good performance in pure Rust code, other
crates may offer better performance with different trade-offs. The following
table offers a brief comparison to a few alternatives.
| Crate | License | Min rustc | Implementation | Features |
|---|---|---|---|---|
num-bigint |
MIT/Apache-2.0 | 1.31 | pure rust | dynamic width, number theoretical functions |
awint |
MIT/Apache-2.0 | 1.66 | pure rust | fixed width, heap or stack, concatenation macros |
bnum |
MIT/Apache-2.0 | 1.61 | pure rust | fixed width, parity with Rust primitives including floats |
crypto-bigint |
MIT/Apache-2.0 | 1.57 | pure rust | fixed width, stack only |
ibig |
MIT/Apache-2.0 | 1.49 | pure rust | dynamic width, number theoretical functions |
rug |
LGPL-3.0+ | 1.65 | bundles GMP via gmp-mpfr-sys |
all the features of GMP, MPFR, and MPC |
License
Licensed under either of
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.